US2688376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air scrubber
Assignee: DANIEL T OERTEL
•
Filing: 1951-10-27
•
Granted: 1954-09-07
•
Expires: 1971-10-27
Abstract
No abstract record available.
Inventors
- 👤 Charles T Gilliam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:51
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; Y; Y10; Y10S; Y10S261/00; Y10S261/09; Y10T; Y10T29/00; Y10T29/18; Y10T29/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US146115A
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US494292A
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GB251682A
Cited
US1673732A
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US2086385A
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US2574848A
Cited
US2585440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |